diff --git a/ui (gen4)/imagegrid/tags.js b/ui (gen4)/imagegrid/tags.js
index 7d001065..82e29334 100755
--- a/ui (gen4)/imagegrid/tags.js	
+++ b/ui (gen4)/imagegrid/tags.js	
@@ -433,6 +433,17 @@ var TagsPrototype = {
 	get length(){
 		return this.values().length },
 
+	// XXX one way to play with this is to add a special tag to set/path
+	// 		to make it persistent...
+	// 		Example:
+	// 			.tag('abc', ...)	-> 'abc' is a normal tag...
+	//
+	// 			.tag('persistent:abc', ...)	-> 'abc' is persistent...
+	// 			.tag('persistent/abc', ...)	-> 'abc' is persistent...
+	//
+	// 		We would need "virtual" tags for this, i.e. tags that are 
+	// 		not actually added to the index but are used for system 
+	// 		stuff...
 	// XXX need a way to add/remove these...
 	persistent: function(){
 		// XXX